界面特性对聚合物驱油时驱替速度的影响分析  

THE INFLUENCE OF DISPLACING VELOCITY ON THE CONTACT INTERFACE ON POLYMER FLOODING

作　　者：夏惠芬[1] 张承丽[1] 宋国亮[2] 王刚[1,3] 马文国[1] 

机构地区：[1]大庆石油学院提高油气采收率教育部重点实验室,黑龙江大庆163318 [2]大庆石油学院数学科学与技术学院,黑龙江大庆163318 [3]大庆油田有限责任公司,黑龙江大庆163453

出　　处：《西南石油大学学报（自然科学版）》2008年第1期74-77,共4页Journal of Southwest Petroleum University(Science & Technology Edition)

基　　金：国家自然科学基金重点项目(50634020);黑龙江省自然科学基金项目(E200621)

摘　　要：针对界面特性(界面流变特性、界面张力特性、润湿性)在聚合物驱油过程中的重要性,将油藏孔隙介质简化成具有相继收缩和扩张的波纹管模型,根据能量平衡原理建立了波纹管中聚合物溶液驱替时的界面特性参数和驱替速度之间的数学模型,用有限差分方法求解,研究了界面粘度、界面张力、润湿角变化对聚合物/油界面速度的影响。研究结果表明:润湿性变化影响界面的驱替速度,当界面的曲率方向与驱替方向相反时,无因次界面张力和无因次界面粘度的增加都使无因次界面轴向速度降低,且界面轴向驱替速度关于孔隙单元中心不对称。More and more researchers have attached importance to the influence of interfacial characteristics(interfacial rheological behavior,interfacial tension behavior and wettability)on oil displacement process.In this paper,the porous medium of reservoir is simplified as a model of undulating pipe which has the behavior of cyclical contraction-expansion.Based on the energy equilibrium principle,a mathematical model between interfacial characteristic parameters and displacement velocity is set up,finite difference method is used to solve the mathematical model.The influence of interfacial viscosity,interfacial tension and wetting angle on interfacial velocity is analyzed.It is indicated that the change of wettability affects displacing velocity,when the directions of interfacial curvature and displacement are contrary,the dimensionless interfacial axial displacing velocity decreases with the increase in the dimensionless interfacial tension and viscosity,and the interfacial axial displacing velocity is asymmetric about the centre of pore unit.

关 键 词：聚合物溶液 波纹管 界面张力 界面粘度 润湿角 

分 类 号：TE357.46[石油与天然气工程—油气田开发工程]